The refurbished Pocket-Dop II has been leading the industry in hand-held Doppler technology for many years. Interchangeable obstetric and vascular probes allow flexibility to configure the Doppler to specific needs. Use the 2 MHz or 3 MHz obstetric probes to hear the fetal heartbeat. Use the 5 MHz or 8 MHz vascular probes to screen patients at risk for stroke, peripheral arterial disease, deep vein thrombosis and other occlusive vascular conditions or to monitor difficult pulses and obtain systolic blood pressures quickly and easily.